AD8400/AD8402/AD8403–Typical Performance Characteristics
10
5
4
3
60
48
36
24
12
0
80
SS = 184 UNITS
V
= +3V OR +5V
H
DD
FF
V
= 4.5V
H
DD
= +25°C
T
8
A
40
H
20
H
6
CODE = 10
H
4
2
1
0
2
R
R
WA
05
T = +25°C
A
WB
H
V
= +5V
DD
0
40.0 42.5 45.0 47.5 50.0 52.5 55.0 57.5 60.0 62.5 65.0
0
32
64
96 128 160 192 224 256
CODE – Decimal
0
1
2
I
3
4
5
6
7
WIPER RESISTANCE – Ω
CURRENT – mA
WA
Figure 2. Wiper to End Terminal
Resistance vs. Code
Figure 3. Resistance Linearity vs.
Conduction Current
Figure 4. 100 kΩ Wiper-Contact-
Resistance Histogram
1
60
10
SS = 1205 UNITS
V
= +5V
DD
V
= 4.5V
R
(END-TO-END)
DD
= +25°C
AB
T
A
48
36
24
12
0
8
6
4
2
0
0.5
0
T
= +85°C
= +25°C
A
T
= –40°C
R
(WIPER-TO-END)
A
WB
T
CODE = 80
A
H
–0.5
–1
0
32
64
96 128 160 192 224 256
DIGITAL INPUT CODE – Decimal
40.0 42.5 45.0 47.5 50.0 52.5 55.0 57.5 60.0 62.5 65.0
–75 –50 –25
0
25
50
75 100 125
WIPER RESISTANCE – Ω
TEMPERATURE – °C
Figure 5. Resistance Step Position
Nonlinearity Error vs. Code
Figure 6. 10 kΩ Wiper-Contact-
Resistance Histogram
Figure 7. Nominal Resistance vs.
Temperature
1
70
60
V
= +5V
V
T
= +5V
SS = 184 UNITS
DD
DD
V
= 4.5V
60
50
40
30
20
10
0
= –40°C/+85°C
= 2.00V
DD
= +25°C
A
T
V
V
48
36
24
12
0
A
A
0.5
0
= 0V
B
T
= +25°C
A
T
= –40°C
A
–0.5
T
A
= +85°C
–1
–10
0
32
64
96 128 160 192 224 256
35 37 39 41 43 45 47 49 51 53 55
0
32
64
96 128 160 192 224 256
CODE – DECIMAL
DIGITAL INPUT CODE – Decimal
WIPER RESISTANCE – Ω
Figure 8. Potentiometer Divider
Nonlinearity Error vs. Code
Figure 9. 50 kΩ Wiper-Contact-
Resistance Histogram
Figure 10. ⌬VWB /⌬T Potentiometer
Mode Tempco
–8–
REV. B